The marks obtained by 40 students of class IX in mathematics are given below;
81,55,68,79,85,43,29,68,54,73,47,35,72,64,95,44,50,77,64,35,79,52,45,54,70,83,
62,64,72,92,84,76,63,43,54,38,73,68,52,54. Prepare a frequency distribution table with
class-size of 10 marks.
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marks
20-30= 1
30-40=3
40-50=5
50-60=8
60-70=8
70-80=9
80-90=4
90-100=2
total =40
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